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<div class="subTitle">org.apache.commons.math3.transform</div>
<h2 title="Interface RealTransformer" class="title">Interface RealTransformer</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../org/apache/commons/math3/transform/FastCosineTransformer.html" title="class in org.apache.commons.math3.transform">FastCosineTransformer</a>, <a href="../../../../../org/apache/commons/math3/transform/FastHadamardTransformer.html" title="class in org.apache.commons.math3.transform">FastHadamardTransformer</a>, <a href="../../../../../org/apache/commons/math3/transform/FastSineTransformer.html" title="class in org.apache.commons.math3.transform">FastSineTransformer</a></dd>
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<pre>public interface <span class="strong">RealTransformer</span></pre>
<div class="block">Interface for one-dimensional data sets transformations producing real results.
 <p>
 Such transforms include <a href="../../../../../org/apache/commons/math3/transform/FastSineTransformer.html" title="class in org.apache.commons.math3.transform"><code>sine transform</code></a>,
 <a href="../../../../../org/apache/commons/math3/transform/FastCosineTransformer.html" title="class in org.apache.commons.math3.transform"><code>cosine transform</code></a> or <a href="../../../../../org/apache/commons/math3/transform/FastHadamardTransformer.html" title="class in org.apache.commons.math3.transform"><code>Hadamard transform</code></a>. <a href="../../../../../org/apache/commons/math3/transform/FastFourierTransformer.html" title="class in org.apache.commons.math3.transform"><code>Fourier transform</code></a> is of a different kind and does not implement this
 interface since it produces <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex"><code>Complex</code></a>
 results instead of real ones.</div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>2.0</dd></dl>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>double[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/transform/RealTransformer.html#transform(double[],%20org.apache.commons.math3.transform.TransformType)">transform</a></strong>(double[]&nbsp;f,
         <a href="../../../../../org/apache/commons/math3/transform/TransformType.html" title="enum in org.apache.commons.math3.transform">TransformType</a>&nbsp;type)</code>
<div class="block">Returns the (forward, inverse) transform of the specified real data set.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>double[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/transform/RealTransformer.html#transform(org.apache.commons.math3.analysis.UnivariateFunction,%20double,%20double,%20int,%20org.apache.commons.math3.transform.TransformType)">transform</a></strong>(<a href="../../../../../org/apache/commons/math3/analysis/UnivariateFunction.html" title="interface in org.apache.commons.math3.analysis">UnivariateFunction</a>&nbsp;f,
         double&nbsp;min,
         double&nbsp;max,
         int&nbsp;n,
         <a href="../../../../../org/apache/commons/math3/transform/TransformType.html" title="enum in org.apache.commons.math3.transform">TransformType</a>&nbsp;type)</code>
<div class="block">Returns the (forward, inverse) transform of the specified real function,
 sampled on the specified interval.</div>
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<h4>transform</h4>
<pre>double[]&nbsp;transform(double[]&nbsp;f,
                 <a href="../../../../../org/apache/commons/math3/transform/TransformType.html" title="enum in org.apache.commons.math3.transform">TransformType</a>&nbsp;type)
                   throws <a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre>
<div class="block">Returns the (forward, inverse) transform of the specified real data set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>f</code> - the real data array to be transformed (signal)</dd><dd><code>type</code> - the type of transform (forward, inverse) to be performed</dd>
<dt><span class="strong">Returns:</span></dt><dd>the real transformed array (spectrum)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - if the array cannot be transformed
   with the given type (this may be for example due to array size, which is
   constrained in some transforms)</dd></dl>
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<h4>transform</h4>
<pre>double[]&nbsp;transform(<a href="../../../../../org/apache/commons/math3/analysis/UnivariateFunction.html" title="interface in org.apache.commons.math3.analysis">UnivariateFunction</a>&nbsp;f,
                 double&nbsp;min,
                 double&nbsp;max,
                 int&nbsp;n,
                 <a href="../../../../../org/apache/commons/math3/transform/TransformType.html" title="enum in org.apache.commons.math3.transform">TransformType</a>&nbsp;type)
                   throws <a href="../../../../../org/apache/commons/math3/exception/NonMonotonicSequenceException.html" title="class in org.apache.commons.math3.exception">NonMonotonicSequenceException</a>,
                          <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a>,
                          <a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre>
<div class="block">Returns the (forward, inverse) transform of the specified real function,
 sampled on the specified interval.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>f</code> - the function to be sampled and transformed</dd><dd><code>min</code> - the (inclusive) lower bound for the interval</dd><dd><code>max</code> - the (exclusive) upper bound for the interval</dd><dd><code>n</code> - the number of sample points</dd><dd><code>type</code> - the type of transform (forward, inverse) to be performed</dd>
<dt><span class="strong">Returns:</span></dt><dd>the real transformed array</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/NonMonotonicSequenceException.html" title="class in org.apache.commons.math3.exception">NonMonotonicSequenceException</a></code> - if the lower bound is greater than, or equal to the upper bound</dd>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if the number of sample points is negative</dd>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - if the sample cannot be transformed
   with the given type (this may be for example due to sample size, which is
   constrained in some transforms)</dd></dl>
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